166632615411556 has 18 divisors (see below), whose sum is σ = 339216395659638. Its totient is φ = 71413978033440.

The previous prime is 166632615411527. The next prime is 166632615411599. The reversal of 166632615411556 is 655114516236661.

It can be written as a sum of positive squares in only one way, i.e., 145732942560100 + 20899672851456 = 12071990^2 + 4571616^2 .

It is a super-2 number, since 2×166632615411556² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166632615411556.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 425083202385 + ... + 425083202776.

Almost surely, 2^{166632615411556} is an apocalyptic number.

It is an amenable number.

166632615411556 is an abundant number, since it is smaller than the sum of its proper divisors (172583780248082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166632615411556 is a wasteful number, since it uses less digits than its factorization.

166632615411556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850166405179 (or 850166405170 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 58.

The spelling of 166632615411556 in words is "one hundred sixty-six trillion, six hundred thirty-two billion, six hundred fifteen million, four hundred eleven thousand, five hundred fifty-six".